package com.imooc.sell.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;

/**
 * cookie工具类
 * @author bizy
 * @date 2019/12/31 21:10
 */
public class CookieUtil {

    public static void set(HttpServletResponse response,
                           String name,
                           String value,
                           int maxAge){
        Cookie cookie = new Cookie(name,value);
        cookie.setPath("/");
        cookie.setMaxAge(maxAge);
        response.addCookie(cookie);
    }

    /*
     * @description:获取cookie
     * @param:
     * @author: bizy
     * @date: 2019/12/31 21:51
     */
    public static Cookie get(HttpServletRequest request,
                           String name){
        Map<String,Cookie> cookieMap = readCookieMap(request);
        if (cookieMap.containsKey(name)) {
            return cookieMap.get(name);
        } else {
            return null;
        }
    }

    /*
     * @description: 将cookie封装为Map
     * @param:
     * @author: bizy
     * @date: 2019/12/31 21:52
     */
    private static Map<String,Cookie> readCookieMap(HttpServletRequest request) {
        Map<String,Cookie> cookieMap = new HashMap<>();
        Cookie[] cookies = request.getCookies();
        if (cookies != null) {
            for (Cookie cookie : cookies) {
                cookieMap.put(cookie.getName(),cookie);
            }
        }
        return cookieMap;
    }
}
